/Engine/Plugins/EnhancedInput/Source/EnhancedInput/Public/EnhancedInputSubsystemInterface.h
Emplace or replace any currently applied key in the first key slot for mapping of MappingName. Requests a rebuild of the player mappings.
The number of mappings that have been replaced
virtual int32 AddPlayerMappedKey ( const [FName](API\Runtime\Core\UObject\FName) MappingName, const [FKey](API\Runtime\InputCore\FKey) NewKey, const [FModifyContextOptions](API\Plugins\EnhancedInput\FModifyContextOptions) & Options )